This drill chuck can easily turn an electric screwdriver into a drill or . You need to turn the tail to make adjustments to quickly tasks and maintain work progress. They are tool accessories. Features -Color: Assorted. -Material: Aluminum alloy. -Size: About 7.20X2.50X1.30cm/2.83X0.98X0.51in. -Chuck Range 0.3-6.5mm; 0.3-3.6mm. - Durable, well-made, they are good enough for most jobs. Small size and lightweight, will not bring additional burden to the operation. - Adopting great quality aluminum alloy material, which let you use for a very long time. - Easy and convenient to install and use, it is very useful drill chuck. - This product can be used in garages, offices, warehouses, homes, etc. - Can be easily to adjusted to quickly task and maintain work progress. Package list: 2 x Drill Chuck Adapters